MIC23156 1.5A, 3 MHz Synchronous Buck Regulator with HyperLight Load 2 and I C Control for Dynamic Voltage Scaling Features General Description Input Voltage: 2.7V to 5.5V The MIC23156 is a high-efficiency, 1.5A synchronous buck regulator with HyperLight Load mode and Up to 1.5A Output Current 2 2 dynamic voltage scaling control through I C. HyperLight 1 MHz I C Controlled Adjustable Output: Load provides very high efficiency at light loads and - V = 0.7 to 2.4V in 10 mV Steps OUT ultra-fast transient response. The ability to dynamically High Output Voltage Accuracy change the output voltage and maintain high output volt- (1.5% over Temperature) age accuracy make the MIC23156 perfectly suited for Fast Pin-Selectable Output Voltage supplying processor core voltages. An additional benefit Programmable Soft-Start Using External Capaci- of this proprietary architecture is very low output ripple tor voltage, throughout the entire load range, with the use of 2 Ultra-Low Quiescent Current of 30 A when small output capacitors. Fast mode plus I C provides Not Switching output voltage and chip enable/disable control from a 2 2 Thermal Shutdown and Current-Limit Protection standard I C bus with I C clock rates of 100kHz, Safe Start-Up into Pre-Biased Output 400 kHz, and 1 MHz. Stable with 1 H Output Inductor and The MIC23156 is designed for use with 1 H, and an 2.2 F Ceramic Capacitor output capacitor as small as 2.2 F, that enables a total Up to 93% Peak Efficiency solution size less than 1 mm in height. 40C to +125C Junction Temperature Range Package Types Available in 16-ball, 0.4 mm pitch, 1.81 mm x 16-Ball 1.81 mm x 1.71 mm WLCSP (CS) 1.71 mm Wafer Level Chip-Scale (WLCSP) and (Top View) 17-pin, 2.8 mm x 2.5 mm QFN Packages 12 3 4 Applications SCL SDA SNS SS A Mobile Handsets Solid-State Drives (SSD) VI2C VSEL PGOOD AVIN B WiFi/WiMx/WiBro Modules Portable Applications C SW SW PVIN AGND PGND PGND PVIN EN D 17-Pin 2.5 mm x 2.8 mm QFN (ML) (Top View) 16 17 1 15 V PGND I2C 2 SCL 14 PGND SDA 3 13 PV IN 4 12 SNS PV IN SS 5 11 V SEL 10 NC 6 EN 9 7 8 2017 Microchip Technology Inc. DS20005919A-page 1 PGOOD SW AV IN SW AGNDMIC23156 Typical Application Schematic U1 APPLICATIONS MIC23156 PROCESSOR CORE PV V SW IN IN SUPPLY SNS AV IN PGOOD POR EN EN V V SEL SEL SS V V I2C I2C PGND 2 SCL I C HIGH-SPEED MODE BUS SDA AGND Efficiency (V = 2.4V) vs. Output Current OUT 100 90 80 70 V = 3.6V IN V = 4.2V IN V = 5V 60 IN 50 40 30 20 C = 2.2 F OUT 10 L = 1 H 0 10 100 1000 10000 OUTPUT CURRENT (mA) DS20005919A-page 2 2017 Microchip Technology Inc. EFFICIENCY (%)